FRAME 24 - TM-9-2815-210-34-2-20257

TM 9-2815-210-34-2-2

FRAME 24

NOTE

T w o sizes of exhaust valve seat inserts (1) are used

in these cylinder heads (2). Standard size exhaust

v a l v e s seat inserts go in standard size exhaust valve

s e a t c o u n t e r b o r e s ( 3 ) . For

0.0100-inch

oversize

exhaust valve seat centerbores, use 0.0100-inch

oversize exhaust valve seat inserts.

Put each e x h a u s t valve seat insert (1) in dry ice for four hours so it will

shrink.

NOTE

Exhaust valve seat insert (1) must be put in its exhaust

v a l v e seat counterbore (3) right after it is taken out of

d r y i c e . I f exhaust valve seat insert is left out too

l o n g , it will get bigger and will not fit.

P u t exhaust valve seat insert (1) in place

on its exhaust valve seat counter-

b o r e ( 3 ) , b e v e l e d e d g e f a c i n g o u t . Using

soft-faced hammer and exhaust

v a l v e seat replacer, put new exhaust valve

seat insert into its exhaust

v a l v e s e a t c o u n t e r b o r e . T a g new exhaust

valve seat inserts for lapping by

m a c h i n e shop,

S e n d cylinder head (2) to machine shop along with intake and exhaust valves

w h i c h seat against new intake and exhaust valve seat inserts. Tell machine

shop to lap new intake and exhaust valve seats to the valves that seat

against them.

END OF TASK

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